Flip down door lock

ABSTRACT

A lock for sliding doors utilizes an elongated locking bar and means for mounting the bar in a first closed position wherein the bar acts to lock the closure by preventing sliding thereof, and in a second open position wherein the bar member allows sliding of the door. Preferably, the mounting means includes a springlock hinge assembly, which acts to bias the bar in its first closed position, and supports it in its second open position without additional support means.

United States Patent 91 Mieras [54] FLIP DOWN DOOR LOCK [76] inventor: Raymond J. Mieras, 1745 Ball, NE.,

Grand Rapids, Mich. 49505 [22] Filed: May 3, 1974 [21] Appl. No.: 466,521

[52] US. Cl 292/262; 292/DlG, 46 [51] Int. Cl. EOSC 17/04 [58] Field of Search. 292/D1G. 46, DIG. 9, BIG 49,

[56] References Cited UNITED STATES PATENTS 531,646 1/1895 Read 292/D1G. 49 2,126,049 8/1938 Shiffman et al 292/DlG. 49 2,941,832 6/1960 Grossman 292/D1G. 46 3,378,293 4/1968 Silk 292/DIG. 46

[ 1 Dec. 23, 1975 Crum 292/262 Adickes 292/DlG, 9

Primary Examiner-Richard E. Moore Attorney, Agent, or Firm-Price, Heneveld, l-luizenga & Cooper [5 7 ABSTRACT 4 Claims, 7 Drawing Figures U.S. Patent Dec. 23, 1975 Sheet 1 of2 3,927,906

U.S. Patent Dec. 21 1975 Sheet 2 of2 3,927,906

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FLIP DOWN DOOR LOCK BACKGROUND OF THE INVENTION The locking device of this invention relates to locks for sliding closures and particularly to locks for sliding doors.

Numerous simple devices have been utilized for locking sliding doors. The most common such device consists of an elongated bar which is manually placed in the bottom track of the sliding door between the door jamb and the abutting door housing frame.

Because of the inconvenience of having to manually place the bar in such a position and then manually removing and storing the bar when not in use, devices were developed which are hingedly mounted below the sliding door housing so as to store the bar in spaced relationship generally parallel to the bottom track of the housing. Such devices are usually engaged by pivot ing the stop bar with ones foot into the door securing position between the door jamb and housing frame. Gravity acts to hold the bar in this position until it is desired to open the sliding door and then the bar is manually pivoted from the locking position into a storage position along the bottom of the door where gravity similarly acts to hold the bar.

The disadvantage of such door stopping devices is that the bar when not securing the sliding door generally interferes with use of floor space adjacent the sliding door. Also, an actual safety hazard may develop because of the danger of tripping or falling over the bar and mounting. Further, in some instances, the bar may be actually disengaged by vibrating the door and/or the door frame by one who is external to the door.

OBJECTS AND SUMMARY OF THE INVENTION Accordingly, it is an object of this invention to provide a locking device which will securely lock a sliding glass door or other sliding closure when in a closed position and which may be disengaged only by one positioned inside the area being secured by the door or closure and not by one standing on the outside tampering with the door frame.

It is another object of the present invention to provide a locking device that is urged into abutting relationship with respect to the door but which may be manually released and which is retractable to permit opening of the door in a direction opposite to which it was closed.

It is a still further object of this invention to provide a locking device which does not interfere with the use of floor space adjacent to the sliding closure.

And, it is still an even further object of this invention to provide a locking device for sliding closures which resists disengagement by vibration of the closure and- /or the frame housing the closure.

These and other objects and advantages of the present invention are accomplished by utilizing a locking means for a sliding closure wherein the sliding closure is slidably mounted in a frame having a header and two jambs. The locking means comprises an elongated bar member and mounting means for suspending the bar member from the header in a first closed position in abutting engagement between the edge of the closure and its adjacent jamb. The mounting means further includes, means for permitting swinging movement of the bar member from the closed position to a second open position in disengagement from between the edge 2 of the closure and the jamb to allow sliding of the closure in the frame.

Preferably, the mounting means for the elongated bar member includes a spring-lock type hinge assembly which resists disengagement when the locking member is in a closed position and which acts to secure the locking member over the closure when the locking member is in the open position without additional support means.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a partial elevational front view of a sliding assembly with a locking device engaged in the door securing or closed position;

FIG. 2 shows a partial elevational front view of the sliding door of FIG. 1 with the locking device in the non-door securing or open position;

FIG. 3 is an enlarged partial vertical cross-sectional side view of the locking device taken along plane III- --III of FIG. 2;

FIG. 4 is an enlarged plan view of the spring-lock hinge assembly of the locking device in FIG. 1 when the locking device is in its closed position;

FIG. 5 is a side view of the spring-lock hinge assembly taken along plane VV of FIG. 4;

FIG. 6 is an enlarged plan view of the spring-lock hinge assembly of the locking device in FIG. 2 when the locking device is'in its open position; and

FIG. 7 is a side view of the spring-lock hinge taken along plane VIIVII of FIG. 6.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawings, sliding closure locking device 20 comprises an elongated locking member or bar 21 with hinge assemblies 22 (FIG. l3) attached thereto. The device 20 is suspended above the sliding door or closure 10 by attachment of hinge assemblies 22 on the sliding door upper or header 14 and shown in FIGS. 1 and 2. As is apparent from the Figures, bar 21 is generally parallel to header l4 and is supported by assemblies 22 at all times in spaced relation therefrom.

The sliding door frame comprises an upper frame or header 14, two side walls on jambs l3 and I6 and a sill along its bottom portion. It further includes a channel 10a in the header 14 along which door 10 may be slid.

Locking member or bar 21, as shown in FIGS. 1-3, is elongated and generally rectangular in shape. In the embodiment shown therein, it is rigid and comprised of a relatively strong material, e.g., metal or wood. If desired, bar 21 may include at both ends thereof stopping surfaces, such as rubber-gripping boots or the like.

Referring to FIGS. 4-7, it can be seen that each spring-lock hinge assembly 22 comprises a flat rectangular planar upper anchoring surface 23 and a similar lower anchoring surface 24 both joined by a hinge portion 25 therebetween and a C-shaped clip 26.

The upper anchoring surface 23 includes along a rectangular slot 23d therein and a flange 230 which protrudes outwardly from the upper anchoring surface 23 and comprises an upwardly directed lip 23b thereon. bower anchoring surface 24 includes a slot 24a in the nonseating portion 24b of the inverted L-shaped lower anchoring surface 24.

C-shaped clip 26, connecting anchoring surfaces 23 and 24, is made of a shape-remembering material such as spring steel comprises lips 260 along both ends thereof. The lips 26a are inwardly directed from the C-shaped clip 26. Clip 26 is positioned between upper anchoring surface 23 and lower anchoring surface 24 by engagement of one of its lips 26a over the lip 23b of flange 23a and by extending through slot 24a and engagement of the other of its lips 26a with the portion of the nonseating wall 24b forming slot 24a in lower anchoring surface 24.

As seen in FIGS. 4 and 5, when hinge assembly 22 is in a closed position, clip 26 is distended over hinged portion 25 of hinge 22. Because of the distension, clip 26 acts to resist upward rotation of lower anchoring surface 24.

In the relaxed or open position shown in FIGS. 6 and 7, clip 26 acts to suspend surface 24 in the position shown. As is apparent from all these figures, lips 26a in the both open and closed positions are secured over lips 23b of flange 23a and over the portion of wall 24!; forming slot 240 in lower anchoring surface 24.

Assembly 22 is attached to header 14 and bar 21 by screws driven through holes 27 in anchoring surfaces 24 and 25. As seen in the preferred embodiment, two assemblies 22 are used but as is apparent, one or several assemblies can be used and placed in whatever position is convenient.

As seen in FIG. 1, locking device 20 prevents opening of movable door 10 along its door channel or track 100 (FIG. 3) by engagement of bar 21 at one end with the door edge 12 of door 14 and at its other end with frame side or jamb l3. Locking device 20 in its disengaged position, shown in FIG. 2, allows free movement of the sliding door 10 along track 100. Further, in its disengaged or open position, bar 21 is held in spaced relationship above track 10a by the spring-lock hinge assemblies 22 without any support in addition to the hinges.

As can be seen particularly in FIG. 3, when device 20 is in the open position, any desired spaced relation between track 10a and bar 21 may be utilized as long as bar 21 is in contact with edge 12. Further, as seen in FIG. 3, bar 21 is secured in its engaged or closed position by not only gravity but also by spring-lock hinge assemblies 22 which, because of distortion of clip 26, act to push bar 21 into static door 11. Because hinge assemblies 22 force bar 21 into static door 1 1, vibration of sliding door 10, door track 10a or other adjacent wall sections will not disengage the closure device.

OPERATION When locking device 20 is in the disengaged or open position, locking bar 21 is secured out of the plane formed by door edge 12 and jamb 13 by lock hinge assemblies 22. Specifically, in each assembly 22, clip 26 attached to upper anchoring surface 23 along flange 23a and to lower anchoring surface 24 in slot 24a secures locking bar 21 in the open position by suspending lower anchoring surface 24 attached thereto from upper anchor surface 23 (FIGS. 2-3) above jamb 12.

When it is desired to secure or lock the movable door 10, door 10 is moved into a closed position against frame side or jamb 16 (FIG. 1) and bar 21 attached to spring-lock hinge assemblies 22, is moved downward into the plane formed by jamb 12 housing wall 13 (FIGS. 6-7). As bar 21 is moved downwardly, clip 26 which is secured between upper wall 11 and bar 21 on the anchoring surfaces as described above is distended or distorted over hinge portion 25 and biases bar 21 inward against static door securing movable door 10. When it is desired to move door 10, bar 21 is subse- 4 quently upwardly rotated out of the plane formed by jamb 13 and closure edge 12.

To readily adapt the locking bar 21 to closures of different sizes, bar 21 may comprise any one of a number of suitable adjustment means, e.g., telescoping elements, etc..

It will be understood that various changes in the details, materials, steps, and arrangements of parts which have been herein described and illustrated in order to explain the nature of the invention, may be made by those skilled in the art within the principle and the scope of the invention as expressed in the appended claims.

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. A locking means for preventing opening of a sliding closure wherein the sliding closure is slidably mounted in a frame having a header above the sliding closure and two jambs, said header having at least one sliding channel on the header along which the closure slides, said locking means comprising: an elongated rigid bar member; and mounting means for suspending said bar member from said header in a first closed position in abutting engagement between the edge of said closure and an adjacent jamb, said mounting means including a spring lock-hinge assembly for permitting swinging movement of said bar member from said first closed position to a second open position in disengagement from between the edge of said closure and said adjacent jamb to allow sliding of said closure in said frame and biasing said locking bar into said first closed position when therein and supporting said bar member over the closure when in said second position without additional support.

2. In combination with a sliding closure with a frame having jambs at both sides thereof, a header above the sliding closure and at least one sliding channel on the header along which the closure slides, said closure being capable of sliding along said channel until one of its edges engages an adjacent jamb, a locking means for said closure comprising:

an elongated rigid bar means; and

mounting means for suspending said bar member from said header in a first closed position in abutting engagement between one edge of said closure and an adjacent jamb, said mounting means including a spring-lock assembly for permitting swinging movement of said bar member from said first closed position to a second open position in disengagement from between said one edge of said closure and said adjacent jamb to allow sliding of said closure in said channel, said assembly biasing said locking bar into said first closed position when therein and supporting said bar member over the closure when in said second open position without additional support.

3. A locking means as recited in claim 1 wherein said spring-lock assembly comprises:

an upper anchoring surface rigidly attached to said header and having a flange,

a lower anchoring surface rigidly attached to said elongated rigid bar member, hingedly attached to said upper anchoring surface, and having a slotted opening, and

a C-shaped resilient clip having a flange at each end, one flange cooperating with the flange of the upper anchoring surface and the other flange cooperating 6 with the slotted opening of the lower anchoring said upper anchoring surface, and having a slotted surface. opening, and 4. A locking means as recited in claim 2 wherein said a C-shaped resilient clip having a flange at each end, spring-lock assembly comprises: 5 one flange cooperating with the flange of the upper an upper anchoring surface rigidly attached to said anchoring surface and the other flange cooperating header and having a flange, with the slotted opening of the lower anchoring a lower anchoring surface rigidly attached to said surface.

elongated rigid bar member, hingedly attached to 

1. A locking means for preventing opening of a sliding closure wherein the sliding closure is slidably mounted in a frame having a header above the sliding closure and two jambs, said header having at least one sliding channel on the header along which the closure slides, said locking means comprising: an elongated rigid bar member; and mounting means for suspending said bar member from said header in a first closed position in abutting engagement between the edge of said closure and an adjacent jamb, said mounting means including a spring lock-hinge assembly for permitting swinging movement of said bar member from said first closed position to a second open position in disengagement from between the edge of said closure and said adjacent jamb to allow sliding of said closure in said frame and biasing said locking bar into said first closed position when therein and supporting said bar member over the closure when in said second position without additional support.
 2. In combination with a sliding closure with a frame having jambs at both sides thereof, a header above the sliding closure and at least one sliding channel on the header along which the closure slides, said closure being capable of sliding along said channel until one of its edges engages an adjacent jamb, a locking means for said closure comprising: an elongated rigid bar means; and mounting means for suspending said bar member from said header in a first closed position in abutting engagement between one edge of said closure and an adjacent jamb, said mounting means including a spring-lock assembly for permitting swinging movement of said bar member from said first closed position to a second open position in disengagement from between said one edge of said closure and said adjacent jamb to allow sliding of said closure in said channel, said assembly biasing said locking bar into said first closed position when therein and supporting said bar member over the closure when in said second open position without additional support.
 3. A locking means as recited in claim 1 wherein said spring-lock assembly comprises: an upper anchoring surface rigidly attached to said header and having a flange, a lower anchoring surface rigidly attached to said elongated rigid bar member, hingedly attached to said upper anchoring surface, and having a slotted opening, and a C-shaped resilient clip having a flange at each end, one flange cooperating with the flange of the upper anchoring surface and the other flange cooperating with the slotted opening of the lower anchoring surface.
 4. A locking means as recited in claim 2 wherein said spring-lock assembly comprises: an upper anchoring surface rigidly attached to said header and having a flange, a lower anchoring surface rigidly attached to said elongated rigid bar member, hingedly attached to said upper anchoring surface, and having a slotted opening, and a C-shaped resilient clip having a flange at each end, one flange cooperating with the flange of the upper anchoring surface and the other flange cooperating with the slotted opening of the lower anchoring surface. 